I.
TITLE: Centrifugal Pump
II. Intended Learning Outcomes
III. Tools and Materials Needed
Combination Wrench (Size 16,17,32)
Ball peen hammer
Mechanical Puller
IV. Procedure
Dismantling
1. Take out the bolts fitted on the discharge nozzle by using wrench
2. Pull out the discharge nozzle
3. Pull out the casing vent
4. Remove the bolts that attached the shaft to the pump casing
5. Pull out the shaft by using the mechanical puller
Reassembling
1. Return back the shaft properly and lightly tap the shaft by using the ball peen hammer to return
it back to the casing
2. Return the bolts that attached the shaft to the pump casing
3. Return the casing vent
4. Return the discharge nozzle
5. Return the bolts fitted on the discharge nozzle by using wrench
V. Parts and Function
1. Seal - Centrifugal pump can be provided with packing rings or mechanical seal which helps
prevent the leakage of the pumped liquid into the atmosphere.
2. Shaft - The main function of the shaft in a centrifugal pump is to transmit the input power from
the driver into the impeller.
3. Casing - The casing contains the liquid and acts as a pressure containment vessel that directs
the flow of liquid in and out of the centrifugal pump.
4. Impeller - Centrifugal pumps use impeller as the primary source for their pumping action. Its
function is to increase the pressure of the liquid.
5. Bearing - The function of the bearing is to support the weight of the shaft (rotor) assembly, to
carry the hydraulic loads acting on the shaft, and to keep the pump shaft aligned to the shaft of
the driver.
6. Coupling - The function of couplings are to connect the pump shaft and the driver shaft, and to
transmit the input power from the driver into the pump.
